The Exposure Triangle is a fundamental concept in photography that explains how three elements—aperture, shutter speed, and ISO—work together to control the exposure of an image. Each element affects the amount of light that reaches the camera sensor, influencing the overall brightness and quality of the photograph. Aperture refers to the size of the lens opening, affecting depth of field. Shutter speed determines how long the camera's sensor is exposed to light, impacting motion blur. ISO measures the sensor's sensitivity to light, allowing for adjustments in low-light conditions. Balancing these three elements is essential for achieving the desired exposure.